package io.trygvis.soilmoisture;

import android.app.ActionBar;
import android.app.ListActivity;
import android.app.ProgressDialog;
import android.content.ComponentName;
import android.content.Intent;
import android.content.ServiceConnection;
import android.os.Bundle;
import android.os.IBinder;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.Button;
import android.widget.ListView;
import android.widget.ProgressBar;
import android.widget.TextView;
import android.widget.Toast;

import com.crashlytics.android.Crashlytics;

import java.util.ArrayList;
import java.util.List;

import io.fabric.sdk.android.Fabric;
import io.trygvis.android.LocalBinder;
import io.trygvis.android.bt.BtActivitySupport;

import static io.trygvis.soilmoisture.ExceptionHandler.EXCEPTION_HANDLER;
import static io.trygvis.soilmoisture.SmDevicesManager.SmDeviceListener;
import static java.lang.String.valueOf;

public class MainActivity extends ListActivity {
    private final static String TAG = MainActivity.class.getSimpleName();

    private static final long SCAN_PERIOD = 3 * 1000;

    private static final int REQUEST_ENABLE_BT = 1;

    private final BtActivitySupport btActivitySupport = new BtActivitySupport(this, REQUEST_ENABLE_BT);
    private final SmDeviceListener serviceListener = new MySmDeviceListener();
    private final MainActivity context = this;

    private DeviceListAdapter deviceList;
    private ServiceConnection serviceConnection;
    private SmDevicesManager smDevicesManager;
    private ProgressDialog initializing;
    private boolean ready;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        Log.i(TAG, "onCreate");
        Thread.setDefaultUncaughtExceptionHandler(EXCEPTION_HANDLER);
        super.onCreate(savedInstanceState);
        Fabric.with(this, new Crashlytics());

        ActionBar actionBar = getActionBar();
        if (actionBar != null) {
            actionBar.setTitle(R.string.title_devices);
        }

        if (!btActivitySupport.onCreate()) {
            finish();
            return;
        }

        serviceConnection = new ServiceConnection() {
            @SuppressWarnings("unchecked")
            @Override
            public void onServiceConnected(ComponentName componentName, IBinder service) {
                Log.i(TAG, "onServiceConnected");
                smDevicesManager = ((LocalBinder<SmDevicesManager>) service).getService();
                registerReceiver(serviceListener, SmDeviceListener.INTENT_FILTER);
            }

            @Override
            public void onServiceDisconnected(ComponentName componentName) {
                Log.i(TAG, "onServiceDisconnected");
                smDevicesManager = null;
                stopScan();
            }
        };

        bindService(new Intent(this, DefaultSmDevicesManager.class), serviceConnection, BIND_AUTO_CREATE);

        initializing = ProgressDialog.
                show(this, "Initializing", "Connecting to Bluetooth system.", true);
    }

    @Override
    protected void onDestroy() {
        Log.i(TAG, "onDestroy");
        super.onDestroy();

        if (serviceConnection != null) {
            unbindService(serviceConnection);
        }
    }

    @Override
    protected void onResume() {
        Log.i(TAG, "onResume");

        super.onResume();

        if (!btActivitySupport.enableBt()) {
            finish();
            return;
        }

        registerReceiver(serviceListener, SmDeviceListener.INTENT_FILTER);
    }

    @Override
    protected void onPause() {
        Log.i(TAG, "onPause");

        super.onPause();
        stopScan();
        unregisterReceiver(serviceListener);
    }

    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        Log.i(TAG, "onActivityResult");

        if (!btActivitySupport.onActivityResult(requestCode, resultCode, data)) {
            finish();
        }

        super.onActivityResult(requestCode, resultCode, data);
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        Log.i(TAG, "onCreateOptionsMenu");
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.main, menu);

        if (ready) {
            if (!smDevicesManager.isScanning()) {
                menu.findItem(R.id.menu_stop).setVisible(false);
                menu.findItem(R.id.menu_scan).setVisible(true);
                menu.findItem(R.id.menu_refresh).setActionView(null);
            } else {
                menu.findItem(R.id.menu_stop).setVisible(true);
                menu.findItem(R.id.menu_scan).setVisible(false);
                menu.findItem(R.id.menu_refresh).setActionView(R.layout.actionbar_indeterminate_progress);
            }
        } else {
            menu.findItem(R.id.menu_stop).setVisible(false);
            menu.findItem(R.id.menu_scan).setVisible(true);
            menu.findItem(R.id.menu_refresh).setActionView(null);
        }
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        Log.i(TAG, "onOptionsItemSelected");

        switch (item.getItemId()) {
            case R.id.menu_scan:
                startScan();
                break;
            case R.id.menu_stop:
                stopScan();
                break;
        }
        return super.onOptionsItemSelected(item);
    }

    private void startScan() {
        smDevicesManager.startScanning(SCAN_PERIOD);
    }

    private void stopScan() {
        if (smDevicesManager != null) {
            smDevicesManager.stopScanning();
        }
    }

    @Override
    protected void onListItemClick(ListView l, View v, int position, long id) {
        stopScan();

//        SmDevice state = smDevicesManager.getDevices(SmDevice.deviceComparator).get(position);
    }

    // -----------------------------------------------------------------------
    //
    // -----------------------------------------------------------------------

    static class DeviceListItem {
        final TextView deviceName;
        final TextView deviceAddress;
        final TextView rssi;
        final ProgressBar spinner;
        final Button connect;

        DeviceListItem(View view) {
            this.deviceName = (TextView) view.findViewById(R.id.device_name);
            this.deviceAddress = (TextView) view.findViewById(R.id.device_address);
            this.rssi = (TextView) view.findViewById(R.id.device_rssi);
            this.spinner = (ProgressBar) view.findViewById(R.id.device_spinner);
            this.connect = (Button) view.findViewById(R.id.button_connect);
        }
    }

    private class DeviceListAdapter extends BaseAdapter {
        private List<SmDevice> devices = new ArrayList<>();
        private LayoutInflater inflater = MainActivity.this.getLayoutInflater();

        @Override
        public int getCount() {
            return devices.size();
        }

        @Override
        public SmDevice getItem(int i) {
            return devices.get(i);
        }

        @Override
        public long getItemId(int i) {
            return i;
        }

        @Override
        public View getView(int i, View view, ViewGroup viewGroup) {
            DeviceListItem item;

            if (view == null) {
                view = inflater.inflate(R.layout.listitem_device, null);
                item = new DeviceListItem(view);
                view.setTag(item);
                view.setClickable(false);
            } else {
                item = (DeviceListItem) view.getTag();
            }

            SmDevice smDevice = getItem(i);
            if (smDevice.getName() != null) {
                item.deviceName.setText(smDevice.getName());
            } else {
                item.deviceName.setText(R.string.unknown_device);
            }
            item.deviceAddress.setText(smDevice.getBtDevice().getAddress());

            item.rssi.setText(getText(R.string.rssi) + ": " +
                    (smDevice.getBtDevice().getRssi() != 0 ? valueOf(smDevice.getBtDevice().getRssi()) : getText(R.string.unknown)));

            boolean useful = smDevice.isUseful();
            item.spinner.setVisibility(useful ? View.GONE : View.VISIBLE);
            item.connect.setVisibility(useful ? View.VISIBLE : View.GONE);
            view.setClickable(useful);

            return view;
        }
    }

    private class MySmDeviceListener extends SmDeviceListener {
        @Override
        public void onReady(boolean ok) {
            if (!ok) {
                Toast.makeText(context,
                        "Could not initialize services.",
                        Toast.LENGTH_SHORT).
                        show();

                finish();
            } else {
                ready = true;
                deviceList = new DeviceListAdapter();
                setListAdapter(deviceList);

                deviceList.notifyDataSetChanged();
                startScan();

                initializing.dismiss();
            }
        }

        @Override
        public void onScanStarted() {
            invalidateOptionsMenu();
        }

        @Override
        public void onScanStopped() {
            invalidateOptionsMenu();
        }

        @Override
        public void onNewDevice(String address) {
            SmDevice device = smDevicesManager.getDevice(address);
            deviceList.devices.add(device);
            deviceList.notifyDataSetInvalidated();

            Log.i(TAG, "deviceList.devices.size() = " + deviceList.devices.size());
        }
    }
}